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MARKET MOVERS

OpenTable stock loses the most ever

Henny Ray Abrams/AFP/Getty Images

OpenTable is available in the United States, Canada, Germany, Japan, Mexico, and the United Kingdom. It also owns and operates toptable.com, a UK restaurant reservation site.

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OpenTable Inc. sank 15 percent, the most since it went public in May 2009. The online restaurant-reservation service forecast revenue in 2012 of no more than $164 million, compared with the average analyst estimate of $168.5 million. According to its website, San Francisco-based OpenTable has more than 25,000 restaurant customers, and, since its inception in 1998 has seated more than 325 million diners.

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